/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.questionnaire.answerOption;

import com.blandware.atleap.common.QuestionnaireModuleConstants;
import com.blandware.atleap.model.questionnaire.AnswerOption;
import com.blandware.atleap.model.questionnaire.Questionnaire;
import com.blandware.atleap.service.questionnaire.QuestionnaireManager;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.questionnaire.AnswerOptionForm;
import com.blandware.atleap.webapp.util.core.LocaleUtil;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import com.blandware.atleap.webapp.util.core.WebappUtil;
import com.blandware.atleap.webapp.util.questionnaire.QuestionnaireModuleWebConstants;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
 * <p>Prepares form bean to update answer option's data
 * </p>
 * <p><a href="CallUpdateAnswerOptionAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.3 $ $Date: 2008/04/29 17:51:53 $
 * @struts.action name="answerOptionForm"
 * path="/questionnaire/answerOption/callUpdate"
 * scope="request"
 * validate="false"
 * roles="questionnaire-answerOption-update,  questionnaire-answerOption-view"
 * @struts.action-forward name="updateAnswerOption"
 * path=".questionnaire.answerOption.update"
 * @struts.action-forward name="listAnswerOptions"
 * path="/questionnaire/answerOption/list.do"
 * redirect="true"
 */
public final class CallUpdateAnswerOptionAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		if ( isCancelled(request) ) {
			return mapping.findForward("listAnswerOptions");
		}

		AnswerOptionForm answerOptionForm = (AnswerOptionForm) form;
		Long answerOptionId;
		if ( !GenericValidator.isBlankOrNull(answerOptionForm.getId()) ) {
			answerOptionId = Long.valueOf(answerOptionForm.getId());
		} else if ( request.getSession().getAttribute(QuestionnaireModuleWebConstants.ANSWER_OPTION_ID_KEY) != null ) {
			answerOptionId = (Long) request.getSession().getAttribute(QuestionnaireModuleWebConstants.ANSWER_OPTION_ID_KEY);
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing answer option ID. Returning to list...");
			}
			return mapping.findForward("listAnswerOptions");
		}
        request.getSession().setAttribute(QuestionnaireModuleWebConstants.ANSWER_OPTION_ID_KEY, answerOptionId);

		QuestionnaireManager questionnaireManager = (QuestionnaireManager) getBean(QuestionnaireModuleConstants.QUESTIONNAIRE_MANAGER_BEAN);
		AnswerOption answerOption = questionnaireManager.retrieveAnswerOption(answerOptionId);

		if ( answerOption == null ) {
			// answer option not found. it might be deleted by someone else
			ActionMessages errors = new ActionMessages();
			errors.add("answerOptionNotFound", new ActionMessage("questionnaire.answerOption.errors.notFound"));
			saveErrors(request, errors);
			return mapping.findForward("listAnswerOptions");
		}

        Questionnaire questionnaire = answerOption.getQuestion().getQuestionnaire();
        if (questionnaire.getFixed().booleanValue()) {
			// questionnaire is fixed, it cannot be edited
			ActionMessages errors = new ActionMessages();
			errors.add("questionnaireIsFixed", new ActionMessage("questionnaire.questionnaire.errors.fixed"));
			saveErrors(request, errors);
			return mapping.findForward("listAnswerOptions");
        }

		WebappUtil.copyProperties(answerOptionForm, answerOption, request);
		answerOptionForm.setTitleMap(answerOption.getTitle());

		List contentLocales = LocaleUtil.getInstance(servlet.getServletContext()).getEnabledLocales();

		request.getSession().setAttribute(WebappConstants.CONTENT_LOCALES_COLLECTION_KEY, contentLocales);

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("updateAnswerOption");
	}
}
